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Asus ZS551KL Troubleshooting Manual page 13

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1. Download: ADB not found during reboot after flash image.
(1) Check the voltage of the power supply (4.2 V), and monitor the current when
power on key pressed down.
(2) Check both fixture pins' contact (T9613 & T9606)
(3) Open the device manager and test offline with a panel connected. If the panel
blackouts when showing ASUS log,
IOFPC & SUB
fastboot mode and run
fastboot erase modemst1
fastboot erase modemst2
fastboot erase fsc
fastboot reboot
If the device enters home after reboot, check RF defects using X-ray.
2. Board MMI: Equipment, key part installation that cause boot fail.
(1) Change the power supply into manual, then press power on. Monitor the
current to see if it enters home.
(2) If testing the MB, swap IOFPC/SB; If testing SB, please change MB.
401 Boot up issues-DL/BMMI
board. If it blackouts when showing android logo, please
cmd.exe:
please check the connection between
enter

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